Contact carrier



March 19, 1935. DOUGLAS I 1,995,172

CONTACT CARRIER Filed Nv. 25, 1952 frzuezzd ar fizrfy CZDozg/aa Patented Mar. 19, 1935 i I t c v UNITED-STATES PATENT OFFICE ooN'rAo'r martian y Harry A. Douglas, Bronson, Mich." I Application November 25, 19s2 -seria1 No.1 644,281

- 3 Claims. (Cl. na -32s) This invention relates to contactcarriers more a pair being sufficiently spaced apart to snugly particularly for electrical circuits. receive one of the extensions therebetween. Among other objects-the invention aimsto The disc 10 is perforated in registry with the provide novel, economical and efiicientassembly perforation 3 in the 'rear wall of the shell,'in

5 means for the carrier and current conducting this instance as by the perforations 14. i As. 5

elements carried thereby. shown in Figure-1, the perforations 14 have fixed Other objects and advantages will be apparent therein hollow rivets 15 which are rearwardly from the following description taken together extended as at 16. The rivets 15 are arranged with the accompanying drawing showing an in parallel and are so located by the perforations illustrative embodiment of the invention. 14 as to be each longitudinally aligned with one 10 In the drawingof the contacts '7 carried by the block 4. Figure 1 is a longitudinal sectional view of one In accordance with my invention, each of the form of structure embodying the invention, parts rivets 15 slidingly receives a metallic sleeve 17. being shown in elevation, and dotted lines in- As shown in. Figure 1, the sleeve 1'? is formed 15 dicating other structures with which the invenintegrally ,with a contact 18, and the wire 19 15 tion may be employed; having the usual insulation 20 thereon is passed Figure 2 is a section somewhat reduced, taken through the sleeve 17 and into the bore 21'of the onthe line 2-2 of Figure l, and being an end contact, the insulation being stripped from the view of the carrier; 7 wire 19 where it terminates in the bore of the 20 Figure 3 is a perspective view of the carrier contact and the sleeve 1'7 encasing the insulation 20 shell alone, also somewhat reduced; and 20 for a portion of its length. The wire 19 is Figure 4 is a view similar to Figure 1 but showpermanently secured to the sleeve 17 and contact ing a modified structure incorporating the in- 18 by having the C t w e a at p vention. erably at more than two places, to reduce its bore 25 The illustrative carrier is inclusive of a cylinas at 23, distorting the wire 19 thereabouts and 25 drical metallic shell 1 having a rear wall 2 perorming interengaging shoulders between the forated as at 3. The forward end of the shell is wire and b re whi h firm y unite t pa s t open to receive a contact carrying plug such as r. e s ve 17 t' ea d is fla the lamp base 4 shown in dotted lines, the lamp as at 4 t P v de a a ul r S ulde at e base having the usual bayonet pin 5 thereon end of the sleeve and the contact 18 is radially 30 which is received in a bayonet channel 6 in the enlarged as at 25 to Provide another ennnler shell 1, tnus fixing the insulated contacts 7, carshoulder, these shoulders limiting movement of ried by the plug 4, rotatively of the shell 1. This the s eev a d Contact in t rivet h forward end of the shell 1 which receives the s u der 24 m y be f ed o the sleeve 17 after plug 4 is desirably bent back upon itself to form the sleeve, with the wire therein, has been passed 35 an integral cylindrical skirt portion 8 which is reerwerdly through the rivet thereefteT t substantially uniformly spaced from theshell 1 p s be normally inseparable The C act to overlap the bayonet channel 6, but at the and sleeve however are urged forwardly to cause same time. to provide clearance for the bayonet t ta to engage one of the complementary pin 5 between the shell 1 and a support for the nta ts 7 by a il sp in 26 disp s d annularlv 4e shell such as the socket 9, alsoshown in dotted about the eve and mpressed between the lines, which may yieldingly grip the skirt portion disc 10 and the shoulder 25. 8. The socket 9, as is well kno-wn, may be itself Referring to the modification shown in Fi r attached to a suitable mounting nd a th 4, the rivets 27 instead of beingthemsel'ves lonsupport both the plug 4 and the contact carrier. gitudinelly eXtended each di y e ves 45 The shell 1 carries an insulating block here therein the sleeve 28 which issep rable from the shown as a fiber disc 10 abutting the rear wall Contact In t i ceselthe sleeve 23 is'fienged 2 of the shell 1 and secured thereto as by having at its wa e s a 0 and at its realWard longitudinal extensions of the shell such as end as at 31 t Provide annular shoulders itthe integral ears 11 bent back over the disc in v ent f th le v The contact 29 is 60 as best shown in Figure 2. To fix the rotative sw de d t t Wire 9 in e W y s i position of the disc 10 with respect to the shell Fi ure 1, but in i a is separable r the the disc may be provided with notches to receive sleeve 28 so that the contact 29, wire 19d and. the extensions 11, here represented by the spaces insulation 20a are all slidingly received in the t between the pairs of ears 12 and 13, the ears of sleeve 28. The contact 29 being radially en- 5 larged as at 32 abuts the shoulder 30 to limit movement of the contact and wire rearwardly,

the contact and wire being pressed forwardly by the coil spring 33 which is compressed between the disc 10 and the shoulder 30. Thus the carrier may be assembled at the factory separably from the wire and contact 29, which may be later inserted in the sleeve 28 by being passed rear- Wardly through the sleeve until the shoulder 32 of the contact abuts the shoulder 30 of the sleeve as described.

It will be understood that when there is no lamp base 4 or other such plug inserted in the forward end of the shell 1, that the contacts de scribed carried by the shell, are urgedforward by the springs 26 or 33 as the case may be until the shoulders at the rear ends of the sleeves 17 or 28 abut their respective-rivets." Obviously, in the case of the Figure 1 structure, the contact 18 itself serves to hold the spring 26 in place, while in the Figure 4 structure, the spring 33 is held in place by the shoulder 30 of. the sleeve 28 even when the contact 29 is removed.

Having described my invention, I claim:

1. A, contact carrier embodying a cylindrical metallic shell portion having a rear wall, the

body thereof being struck up to form oppositely disposed ears in prolongation of the shell side Wall and cut out therebetween to form opposite.-

ly disposed similar semi-circular perforations, in v combination with a contact carrying disc of insulating material having oppositely disposed pairs of outstanding ears adapted to snugly receive between each pair one of the rear wall prolongations of the shell and clamped against the said rear Wall by the ends of said prolongations bent into engagement with the exterior thereof.

2. The structure of claim 1 wherein the disc is provided with oppositely disposed perforations concentric with the end wall perforations for reciprocably mounting contacts extending within the interior of the shell.

3. The structure of claim 1 wherein the disc is provided with oppositely disposed perforations concentric with the end 'wall perforations for reciprocably mounting contacts extending Within'the interior of the shell including a spring pressed sleeve within each perforation and about each contact to extend the respective contacts within the shell."

' HARRY A. DOUGLAS. 

